I really want to learn some new songs on bass, but speed is an issue. I want to learn something as well as honing my skills. I learned some of Necropedophile and Hammer Smashed Face, as well as some...

I dont use an interface, and I have no problems using Reaper and GR4. Have you downloaded ASIO? That could help. Download that, and then try plugging your guitar straight into the mic of your laptop...